The High Pallet Open Top mezzanine safety gate uses two gates that work in unison without any overhead mechanism, one gate open and the other closed at all times. When one gate is lifted, a counterbalance system drops the other gate to close off the opposite end of the load zone. In this way, the load zone can be accessed from the mezzanine edge by lift systems whether forklifts, AGV's or overhead cranes, while keeping the mezzanine floor access closed off until the edge gate is closed. As the edge gate closes, the floor level gate opens, allowing the load to be moved, all the while maintaining employee safety. This model is single pallet width.